Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

MRS. DIANTHA JEAN LARSON CCDC T
NPI 1669467577
Counselor - Addiction (Substance Use Disorder) in Watertown, SD

Q: What is the provider's specialty?

The provider's specialty is Counselor with taxonomy code 101YA0400X and a focus in Addiction (Substance Use Disorder).

Active since September 16, 2005

123 19TH ST NE, WATERTOWN, SD 57201(605) 886-0123(605) 886-5447 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

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About Mrs. Diantha Jean Larson Ccdc T NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MRS. DIANTHA JEAN LARSON CCDC T (NPI 1669467577) is an individual addiction (substance use disorder) provider in Watertown, South Dakota, licensed in South Dakota (3085) and active in the NPI registry since September 2005.

NPPES Registry Identity

NPI1669467577

Entity TypeIndividualFemale

Primary Taxonomy101YA0400X

Provider Legal NameMRS. DIANTHA JEAN LARSONCredential: CCDC T

Location Address123 19TH ST NEWatertown, SD 57201-2823

Mailing AddressPo Box 1030Watertown, SD 57201-6030 · (605) 886-0123 · Fax (605) 886-5447

Phone(605) 886-0123

Fax(605) 886-5447

Sole ProprietorNo

Enumeration DateSeptember 16, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1669467577 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers

Taxonomy Code101YA0400X

License✔ Licensed in SD · 3085

123 19TH ST NE, Watertown, SD 57201

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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

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